Portable computer



FIG. 1 is a front, top perspective view of a portable computer showing our new design;

FIG. 2 is front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines are for the purpose of illustrating portions of the portable computer and form no part of the claimed design. The black shading on the front of the screen represents the color black and the dark gray shading on the front of the screen represents the color gray. 

The ornamental design for a portable computer, as shown and described. 